

import itertools
import string
from collections.abc import Generator, Iterable


def 					_UpperCAmelCase				(						a__  ,	a__):

			'''simple docstring'''



			a_						:						Union[str, Any] 							= iter(a__)
			while True:
						a_						:						Dict 							= tuple(itertools.islice(a__  ,	a__))
						if not chunk:
									return
						yield chunk


def 					_UpperCAmelCase				(						a__):

			'''simple docstring'''



			a_						:						int 							= """""".join([c.upper() for c in dirty if c in string.ascii_letters])
			a_						:						Tuple 							= """"""

			if len(a__) < 2:
						return dirty

			for i in range(len(a__) - 1):
						clean += dirty[i]

						if dirty[i] == dirty[i + 1]:
									clean += "X"

			clean += dirty[-1]

			if len(a__) & 1:
						clean += "X"

			return clean


def 					_UpperCAmelCase				(						a__):

			'''simple docstring'''



			a_						:						Optional[Any] 							= """ABCDEFGHIKLMNOPQRSTUVWXYZ"""
			# we're using a list instead of a '2d' array because it makes the math
			# for setting up the table and doing the actual encoding/decoding simpler
			a_						:						Tuple 							= []

			# copy key chars into the table if they are in `alphabet` ignoring duplicates
			for char in key.upper():
						if char not in table and char in alphabet:
									table.append(a__)

    # fill the rest of the table in with the remaining alphabet chars
			for char in alphabet:
						if char not in table:
									table.append(a__)

			return table


def 					_UpperCAmelCase				(						a__  ,	a__):

			'''simple docstring'''



			a_						:						str 							= generate_table(a__)
			a_						:						Optional[int] 							= prepare_input(a__)
			a_						:						List[str] 							= """"""

			# https://en.wikipedia.org/wiki/Playfair_cipher#Description
			for chara, chara in chunker(a__  ,	2):
						a_							,					a_						:						Any 							= divmod(table.index(a__)  ,	5)
						a_							,					a_						:						Any 							= divmod(table.index(a__)  ,	5)

						if rowa == rowa:
									ciphertext += table[rowa * 5 + (cola + 1) % 5]
									ciphertext += table[rowa * 5 + (cola + 1) % 5]
						elif cola == cola:
									ciphertext += table[((rowa + 1) % 5) * 5 + cola]
									ciphertext += table[((rowa + 1) % 5) * 5 + cola]
						else:  # rectangle
									ciphertext += table[rowa * 5 + cola]
									ciphertext += table[rowa * 5 + cola]

			return ciphertext



def 					_UpperCAmelCase				(						a__  ,	a__):

			'''simple docstring'''



			a_						:						Optional[Any] 							= generate_table(a__)
			a_						:						int 							= """"""

			# https://en.wikipedia.org/wiki/Playfair_cipher#Description
			for chara, chara in chunker(a__  ,	2):
						a_							,					a_						:						Optional[int] 							= divmod(table.index(a__)  ,	5)
						a_							,					a_						:						str 							= divmod(table.index(a__)  ,	5)

						if rowa == rowa:
									plaintext += table[rowa * 5 + (cola - 1) % 5]
									plaintext += table[rowa * 5 + (cola - 1) % 5]
						elif cola == cola:
									plaintext += table[((rowa - 1) % 5) * 5 + cola]
									plaintext += table[((rowa - 1) % 5) * 5 + cola]
						else:  # rectangle
									plaintext += table[rowa * 5 + cola]
									plaintext += table[rowa * 5 + cola]

			return plaintext





import math


def 					_UpperCAmelCase				(						a__ = 1_0_0):

			'''simple docstring'''



			a_						:						List[str] 							= sum(i * i for i in range(1  ,	n + 1))
			a_						:						Optional[Any] 							= int(math.pow(sum(range(1  ,	n + 1))  ,	2))
			return square_of_sum - sum_of_squares


if __name__ == "__main__":
	print(F"""{solution() = }""")


